President Bush acknowledged the public's agitated state Tuesday night when he gave voice to growing concerns about the course of the nation he has led for five years. His credibility no longer the asset it once was, the president begged Americans' indulgence for another chance to fix things.

In his fifth State of the Union address, Bush sought to balance his usual optimistic message with an odd-fitting acknowledgment that many Americans are suffering beneath a crush of change.

"Fellow citizens, we have been called to leadership in a period of consequence. We have entered a great ideological conflict we did nothing to invite," Bush said. "We see great changes in science and commerce that will influence all our lives. And sometimes it can seem that history is turning a wide arc, toward an unknown shore."

Unknown and uneasy.

At a private home tucked in a quiet neighborhood in Costa Mesa, Calif., about two dozen people from all walks of life gathered to watch Bush's speech while eating tacos and potato chips. One of them, social worker Julie Carlson, said she felt "negative" about the overall state of the nation, particularly the health care system.

"There seems to be every week something that comes up, something I don't agree with or something that disheartens me," said Carlson, 29.

The problem for Bush is that few of these troubles are new. He's had five years to ease people's pain. Nearly 46 million Americans have no health insurance, up nearly a million in the last year. Health care costs are increasing three or four times the rate of inflation.

One of the first successes of Bush's presidency was the 2002 No Child Left Behind law, but parents still wonder about the quality of education in their schools. For the first time in generations, American children could face poorer prospects than their parents and grandparents did.

Calling for less dependency on foreign oil is a State of the Union evergreen. Bush has done so in every address.

The president who promised to be a uniter, not a divider, has presided over the hyper-polarization of Washington.

Osama bin Laden has not been caught.

Weapons of mass destruction were not found in Iraq.

Victory in that war seems elusive, with more than 2,240 American troops killed - and counting.

The divide over Iraq spilled into the House chamber, where parents of fallen soldiers attended in support of Bush and peace protester Cindy Sheehan was arrested just before the address.

The mood of the nation is unsettled. Nearly 7 of 10 American believes the country is headed in the wrong direction. Bush's job approval ratings are among the lowest of his presidency. At the core of his political problems is his loss of credibility. Most voters believed he was a strong and principled leader in 2004, leading many to support him despite their opposition to the Iraq war and a sluggish economy. Democrats hope those numbers don't change after Bush's address. "It's an attempt to make himself healthy before the midterms," said Democratic strategies Dane Strother. Americans may be anxious, he said, "but they're not dumb."

Editor's note: Ron Fournier has covered the White House and politics for The Associated Press since 1992. Gillian Flaccus in Costa Mesa, Calif., contributed to this story.